Samsung Propel A767

So I have the Samsung A727, and it's an okay phone, the keys are kind of hard to text on and the biggest problem I have with it is that I can't change the text message ringtone from the default options that the phone comes with. I read somewhere that you have to have .mmf files.

I'm thinking about getting the Propel, as I really like everything else about the samsung but am hoping that is more like the 737 (small slider) as opposed to the 727.

Can you set ringtone files for text messages? or for individual callers??